The J is the most powerful engine you can build through normal play, reaching the game's famous 717 hp ceiling when fully upgraded with a turbo kit. It's a straight-six based on the real-world Toyota 1JZ, and it's the universal swap — the engine almost every non-rotary, non-capped car uses to hit max power.
Stats
| Stock | Fully upgraded |
|---|
| Type | Straight-6 | Straight-6 |
| Power | 275 hp | 717 hp (with turbo) |
| Weight | 165 kg | 160 kg |
| Max RPM | 7,500 | 8,500 |
| Price | $16,000 | ≈ $168,300 + 140 Gold (all upgrades + turbo) <!-- verify total in-game --> |
Available in
Stock in the JZX100 Mark II and Chaser, and swappable into most of the roster: S13, GT86, Altezza, E30, AE86, S14 (Zenki/Kouki), 180SX, R32 (2D/4D), S15, Miata, 2105, KPGC, E36 — essentially every non-rotary, non-tribute car. (Rotary cars — FC, FD — can't take it.)
Turbo kits
Stock turbo kit and Turbo kit 1.
Upgrades
Per-level costs and effects. "Gold" prices are the premium currency. Confirm totals in-game before publishing.
Engine Enhance
| Level | Cost | HP limit | HP | Weight |
|---|
| 0 | — | 300 | +0 | +0 |
| 1 | $1,600 | 400 | +5 | +2 kg |
| 2 | $2,800 | 500 | +10 | +2 kg |
| 3 | $4,000 | 600 | +20 | +2 kg |
| 4 | $8,000 | 700 | +30 | +0 kg |
| 5 | 40 Gold | 800 | +40 | −5 kg |
Camshafts
| Level | Cost | HP | Weight |
|---|
| 0 | — | +0 | +0 |
| 1 | $1,200 | +10 | +1 kg |
| 2 | $2,400 | +15 | +1 kg |
| 3 | $2,800 | +20 | +2 kg |
| 4 | $5,600 | +30 | +1 kg |
| 5 | 30 Gold | +50 | −1 kg |
Transmission
| Level | Cost | Efficiency | HP | Weight |
|---|
| 0 | — | 78% | +0 | +0 |
| 1 | $1,200 | 80% | +5 | +2 kg |
| 2 | $2,400 | 82% | +10 | +2 kg |
| 3 | $3,600 | 85% | +20 | +1 kg |
| 4 | $5,600 | 88% | +30 | +0 kg |
| 5 | 30 Gold | 90% | +50 | −5 kg |
ECU
| Level | Cost | HP | Max RPM |
|---|
| 0 | — | +0 | +0 |
| 1 | $2,000 | +20 | +100 |
| 2 | $3,200 | +40 | +200 |
| 3 | $5,600 | +60 | +350 |
| 4 | $8,000 | +80 | +550 |
| 5 | 40 Gold | +100 | +1,000 |
Trivia
- The J's real-world counterpart is the Toyota 1JZ.
- In the Miata, the J's 3D model is uniquely shrunk down to fit the tiny engine bay.
